AME for repairs, reconditioning and overhauling of Transformers available in ESD-South,Tirumala for 2026-27

Routine maintenance of transformer, including testing of insulation resistance, oil break down strength. Reconditioning / replacement of silicazel, cleaning of transformer and topping upto oil level if required (extra cost will be paid for oil).

Scope of work Monthly (a) Checking of oil leakage at Tank, bushing and cleaning etc., (b) Checking oil level in conservator tank (c) Checking of Earth Flat connections at transformers. (d) Checking colour of Silica gel and reactivating or replacing. (e) Checking the diaphragm for cracks. (f) Maintenance Reports to be submitted. Quarterly (a) Measurement of Voltages at Transformer and tail ends of the feeder. (b) Measurement of loads in ampehers on earth (c) Taking IR values of the winding. (d) Above Maintenance Reports to be submitted. Yearly (a) Collecting oil samples for di-electric strength (b) Above Reports to be submitted.

Testing of Transformer oil for dielectric break down strength.

Replacing old and unserviceable gasket of top cover plate of transformer having following capacity.

Replacing old and unserviceable gasket of bushing for the following Transformer capacity

up to 315 KVA HT,

up to 315 KVA LT,

Replacing ……….. for distribution Transformer by new one

H.T bushing with metal parts

L.T bushing rod with metal parts 500/1000 KVA

Supply of new and tested transformer oil as per IS-335 - 1972 (per Ltr)

Filteration of transformer oil as per ISS specifications filters to die electric strength above 40 K.V. (per Ltr)

at site.(Per Ltr) excluding transportation

Supply and fixing of distribution type lightning arrester 11 KV 5 kA as per IS 3070 with mounting base on the existing DP structure

Supply and fixing of 11 KV ,400 A 3 phase central post rotating double break type AB switch(isolator) as per IS 9921) without earth blade,gang operated ,Hozizontal type,operating mechanism with GI spring loaded reverse loop type fixed contact,solid HD electrolytic copper tubular moving contact with silver/Nicle plated at end points,9 Nos post insulators of 12 Kv(IS 2594 and IS 5350) ,Hot Dip galvenizing hardware,GI pipe,Nuts and bolts etc., complete

Supply and erecting porcelain post type insulator suitable for 11KV line with suitable hardware on existing cross arms.

Dismantling charges of old AB switch

Supply and fixing the 1.0 KG Transporent Silicagel breather

Measuring of earth resistance in the sub.station yard and building upto the required level if necessary by suitable methods, necessary instruments for measuring the resisance shall be arranged by the contractor at his cost. The resistance value shall be with in the permissible limit prescribed. A certificate for testing of earth resistance shall be furnished.

Screen painting on the new existing pre-cast slab available sub.station top of earth pit etc. indicating location, DOM : Date, Values: Ohms. The size of the letter should be minimum 25 mm. The work will have to be done at site

Supply and Making heat shrinkable type outdoor terminations / joint kit of approved make suitable for XLPE insulated 11 KV cable, with required components, prepration of cable ends, testing etc. as required of 3 core 120 / 150 / 185 Sq.mm sizes. Makes: Raychem / M seal / Denson / Multy / Transeal- Hongshang

Painting to transformer with 2 coats Zinchromate red oxide duly scraping existing paint followed by 2 coats of hammerton grey paint etc., complete. Upto 500 KVA.

Supply and fixing 100 A 11 KV Horn Gap fuse set as per IS 9385 on existing DP strcuture with 6 Nos 24 KV /22 KV post insulators (IS 5350, Hot dipped Hard ware, fuse wire of required size etc., complete.

Painting with Aluminium paint grade-l of approved make including brushes to have an even shade including cost and conveyance of all materials as directed during execution complying with standard specifications, etc., complete

Single coat for New Iron works

Less buy back offer for old oil from existing transformer

NOTE (i)The rates are of basic rates excluding GST. (ii) The applicable GST will be reimbursed/paid as per actuals on production of proof. (iii)Statutory deductions will be made as per norms, if applicable. Any modalities imposed on GST by the Government from time to time, the same will be implemented.

Routine maintenance of transformer, including testing of insulation resistance, oil break down strength. Reconditioning / replacement of silicazel, cleaning of transformer and topping upto oil level if required (extra cost will be paid for oil).

Scope of work Monthly (a) Checking of oil leakage at Tank, bushing and cleaning etc., (b) Checking oil level in conservator tank (c) Checking of Earth Flat connections at transformers. (d) Checking colour of Silica gel and reactivating or replacing. (e) Checking the diaphragm for cracks. (f) Maintenance Reports to be submitted. Quarterly (a) Measurement of Voltages at Transformer and tail ends of the feeder. (b) Measurement of loads in ampehers on earth (c) Taking IR values of the winding. (d) Above Maintenance Reports to be submitted. Yearly (a) Collecting oil samples for di-electric strength (b) Above Reports to be submitted.

Testing of Transformer oil for dielectric break down strength.

Replacing old and unserviceable gasket of top cover plate of transformer having following capacity.

Replacing old and unserviceable gasket of bushing for the following Transformer capacity

up to 315 KVA HT,

up to 315 KVA LT,

Replacing ……….. for distribution Transformer by new one

H.T bushing with metal parts

L.T bushing rod with metal parts 500/1000 KVA

Supply of new and tested transformer oil as per IS-335 - 1972 (per Ltr)

Filteration of transformer oil as per ISS specifications filters to die electric strength above 40 K.V. (per Ltr)

at site.(Per Ltr) excluding transportation

Supply and fixing of distribution type lightning arrester 11 KV 5 kA as per IS 3070 with mounting base on the existing DP structure

Supply and fixing of 11 KV ,400 A 3 phase central post rotating double break type AB switch(isolator) as per IS 9921) without earth blade,gang operated ,Hozizontal type,operating mechanism with GI spring loaded reverse loop type fixed contact,solid HD electrolytic copper tubular moving contact with silver/Nicle plated at end points,9 Nos post insulators of 12 Kv(IS 2594 and IS 5350) ,Hot Dip galvenizing hardware,GI pipe,Nuts and bolts etc., complete

Supply and erecting porcelain post type insulator suitable for 11KV line with suitable hardware on existing cross arms.

Dismantling charges of old AB switch

Supply and fixing the 1.0 KG Transporent Silicagel breather

Measuring of earth resistance in the sub.station yard and building upto the required level if necessary by suitable methods, necessary instruments for measuring the resisance shall be arranged by the contractor at his cost. The resistance value shall be with in the permissible limit prescribed. A certificate for testing of earth resistance shall be furnished.

Screen painting on the new existing pre-cast slab available sub.station top of earth pit etc. indicating location, DOM : Date, Values: Ohms. The size of the letter should be minimum 25 mm. The work will have to be done at site

Supply and Making heat shrinkable type outdoor terminations / joint kit of approved make suitable for XLPE insulated 11 KV cable, with required components, prepration of cable ends, testing etc. as required of 3 core 120 / 150 / 185 Sq.mm sizes. Makes: Raychem / M seal / Denson / Multy / Transeal- Hongshang

Painting to transformer with 2 coats Zinchromate red oxide duly scraping existing paint followed by 2 coats of hammerton grey paint etc., complete. Upto 500 KVA.

Supply and fixing 100 A 11 KV Horn Gap fuse set as per IS 9385 on existing DP strcuture with 6 Nos 24 KV /22 KV post insulators (IS 5350, Hot dipped Hard ware, fuse wire of required size etc., complete.

Painting with Aluminium paint grade-l of approved make including brushes to have an even shade including cost and conveyance of all materials as directed during execution complying with standard specifications, etc., complete

Single coat for New Iron works

Less buy back offer for old oil from existing transformer

NOTE (i)The rates are of basic rates excluding GST. (ii) The applicable GST will be reimbursed/paid as per actuals on production of proof. (iii)Statutory deductions will be made as per norms, if applicable. Any modalities imposed on GST by the Government from time to time, the same will be implemented.

(Rupees Six lakhs seventy three thousands one hundred sixty four and paise fifteen only)